dimas-b commented on code in PR #14196:
URL: https://github.com/apache/iceberg/pull/14196#discussion_r2456507168
##########
open-api/rest-catalog-open-api.yaml:
##########
@@ -1903,6 +1926,34 @@ components:
schema:
type: string
+ idempotency-key:
+ name: Idempotency-Key
+ in: header
+ required: false
+ schema:
+ type: string
+ format: uuid
+ minLength: 36
+ maxLength: 36
+ example: "550e8400-e29b-41d4-a716-446655440000"
+ description: |
+ Optional client-provided idempotency key for safe request retries.
+
+ When present, the server ensures no additional effects for requests
that carry the same
+ Idempotency-Key within the same operation/resource scope. If a prior
request with this key
+ has been finalized, the server returns the previously finalized
response instead of
+ re-executing the mutation.
+
+ Finalization rules:
+ - Finalize & replay: 200, 201, 204, and deterministic terminal 4xx
+ - Do not finalize (not stored/replayed): 5xx, 409 request_in_progress
+
+ Key Requirements:
+ - Key format: UUID (V7 preferred)
Review Comment:
For ref., the current IETF draft v7
[states](https://www.ietf.org/archive/id/draft-ietf-httpapi-idempotency-key-header-07.html#name-client):
`Clients of HTTP API requiring idempotency SHOULD understand the idempotency
related requirements as published by the server and use appropriate algorithm
to generate idempotency keys.`
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